Finally, I also played a couple rounds of CS: Source (Raw mouse input mode on) mainly because it’s a good way to test for mouse acceleration. For those unfamiliar with mouse acceleration, it’s when the mouse moves more or less depending on how fast you move the mouse. Unfortunately, many new games such as Battlefield 3 has built in mouse acceleration, which is terrible for those skilled in twitch aiming. That said, I did notice very slight amounts of negative acceleration, but it was definitely not a major issue. Moving from one side of the large CM Storm Speed RX mousepad (~17in – 18in) to another only yielded maybe a 300px to 500px difference in position on screen. This is significantly less acceleration than what we saw from the older Avago ADNS-9500 sensors. Additionally, I didn’t notice any lift off issues at all, which was a huge problem with some of the other Razer mice that used the Phillips Twin Eye sensor.